In these next few exercises, we're going to be discussing issues related to…geometric distortions, and this might include straightening an image or cropping it.…Now that's all child's play by now I would think.…It works a little differently inside of Camera Raw, and I'll explain how that works.…But we also have Lens Correction options, because here's the thing.…Straightening isn't always a very satisfying process.…You may get one of the elements inside of your image exactly plumb, but a…bunch of neighboring elements may be out of alignment and then you sort of…have to pick and choose who is going to be plumb, who is not going to be…plumb, that kind of thing.…

This may be a function of the perspective of the scene.…It may be a function of lens distortion, which is the way the light comes…in through the lens.…You may get a barrel effect or a pincushion effect, something along those lines,…and you can correct for all of these effects using the Lens Correction options,…which are extremely satisfying features as you'll see.…

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Author

Updated

8/31/2010

Released

8/13/2010

Photoshop CS5 One-on-One: Advanced, the second part of the popular and comprehensive series, updated for CS5, follows internationally renowned Photoshop guru Deke McClelland as he dives into the workings of Photoshop. He explores such digital-age wonders as the Levels and Curves commands, edge-detection filters, advanced compositing techniques, vector-based text, the Liquify filter, and Camera Raw. Deke also teaches tried-and-true methods for sharpening details, smoothing over wrinkles and imperfections, and enhancing colors without harming the original image. Exercise files accompany the course.